We are doing 10 GPA using GRAMOXONE Inteon at 48oz/acre with 1qt of LI 700 per 100gl H2O. I use AI400110 at anywhere from 35 to 85 LBS pressure at up to 20 MPH. Killing 6ft tall tumble weeds and pig weeds with it. The pigweeds however will come back after a few weeks, even in our drought. This is on wheat stubble ground that has not seen a drop of water since April when we shut the water off of the wheat crop.